Have to say I'll pass. Photographing churches is one of the few aspects of photography that holds not one iota of interest to me.
No need to be grumpy about it. It was a polite invitation. Are you a follower of Dawkins? I happen to be a bit of an atheist myself but I think that the historic church buildings are magnificent and also that the C of E is a good thing for those people who believe in all that supernatural stuff.
I hope casual visitors have a bit more respect at York than some seen recently at Southwell Minster.